How nice would high octane gas be?

ToMang07 said
The ethanol formula works, as long as it's used while the gas is fresh. I prefer seafoam myself.

I take that back. I prefer 100% petroleum fuel, in which I never had to (pay more to) add anything.

that was my point..i was using ethanol free shell 91.I have had regular gas go bad in stored roto tillers,and lawn mowers too.